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Functional electrical stimulation system

a functional and electrical stimulation technology, applied in the field of functional electrical stimulation systems, can solve the problems of involuntary muscular contraction and weakness of the extensor muscle on the upper limb, and achieve the effect of improving the electrical stimulation

Active Publication Date: 2007-01-09
THE HONG KONG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Benefits of technology

[0007]It is an object of the present invention to provide a Functional Electrical Stimulation systems which assists with rehabilitation of stroke patients, or which at least offers a useful choice.

Problems solved by technology

After stroke patients often suffer from weakness in the extensor muscle on the upper limb and involuntary muscular contractions due to spasticity of the flexor muscle groups.

Method used

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Embodiment Construction

[0047]FIGS. 1 and 2 are schematics of a Functional Electrical Stimulation (FES) system. It consists of three basic parts: a hand-wrist orthosis 100, a portable stimulation unit 102 and a docking station 101. The FES interfaces with a computer 104. The functional electrical stimulation system has two basic configurations. FIG. 1 illustrates the first configuration, which is for training and parameter setup. FIG. 2 illustrates the second configuration in which the portable stimulation unit works in standalone mode without connection to the docking station. These configurations will be described in more detail later.

[0048]Referring to FIGS. 3 to 6, the hand-wrist orthosis 100 is made of plastic material moulded to fit the shape of the forearm of a stroke affected hand 21 of a patient. The orthosis 100 comprises three pieces. These are: a posterior portion 7, anterior portion 8, and a hand portion 9. The hand portion 9 is connected with the anterior portion 8 by two joints 10, 11 on the...

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Abstract

An electrical stimulation device for a body part of a person comprises an orthotic with sensor and electrodes and a controller. The controller receives a sensor signal, compares the sensor signal to a threshold value and generates an electrical output from the electrodes if the sensor signal exceeds the threshold value. A docking station facilitates connection of the electrodes and sensors to a computer. The docking station including a first processor for measuring values of the sensor signal and the electrical outputs and a second processor for generating electrical outputs on the electrodes.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to Functional Electrical Stimulation Systems.[0003]2. Background Information[0004]Functional Electrical Stimulation (FES) systems artificially stimulate the muscles, and muscle groups, of persons through the use of electrical current in order to stimulate movement. As early as 1971 Liberson applied electrical stimulation to assist walking in patients with foot drop. Current FES systems are mainly designed for persons after a spinal cord injury and stroke.[0005]Several different groups of researchers have designed implant electrodes and systems for spinal cord injured persons. These systems need to be surgically implanted into muscle groups and are aimed at control of deep muscles.[0006]After stroke patients often suffer from weakness in the extensor muscle on the upper limb and involuntary muscular contractions due to spasticity of the flexor muscle groups. FES can be used with stroke victi...

Claims

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Application Information

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IPC IPC(8): A61N1/36A61N1/04
CPCA61N1/0452A61N1/36003A61N1/0484
Inventor TONG, KAI-YUMAK, ARTHUR F. T.LEUNG, KELVIN T. Y.
Owner THE HONG KONG POLYTECHNIC UNIV
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